水稻原丰早具有早熟、适应性广等特点,由于它比亲本早熟45d,因而在解决我国南方水稻多熟制栽培中发挥了重要作用。()
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通过诱变育种同时改良多个性状的难度很大。()
A. 对
B. 错
β射线是目前辐射育种中最常用的诱变剂。()
A. 对
B. 错
2012.12 Task 4A-Bank loanB--Business planC-Investment returnD-Consumer price indexE-Cost controlF--Contract workerG--Customer loyallyH-Daughter companyI-Parent companyJ-Import DutyK-Price ControlL-Sales TaxM-Cash flowN-Mail OrderO--Factory PriceP-Contract of employmentQ-Employment LawExamples:(I)母公司(Q)劳工法51.( )成本控制 ( )消费者物价指数